.net-4.0

问题 I just installed VS 11 within Windows 8. When I got the latest of a solution built with VS 2010, then built it, I'm getting this error (in VS 11): The predefined type 'System.Tuple' is defined in multiple assemblies in the global alias; using definition from 'c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.0\mscorlib.dll' I haven't been able to find an answer via Google. And I don't know what the "global alias" is. Those words are too generic to find via a

问题 My server side sends me batches of messages. The no of messages in a batch and frequency is arbitrary. At times I get messages at 1 minute intervals and at times not messages for an hour. At times 1 message and at times 10. My current implementation uses Observable.Buffer(TimeSpan.FromSeconds(5)) to group and send the messages to subscriber. Instead of having to check every 5 seconds, is there a way to configure the Observable to say send your buffered messages to subscriber if there's a x

问题 I am creating an enterprise web template to be used for development of all our web applications. Many of our existing applications take a while to load because of the amount of data and geographic distance of the data source, so users frequently click the same buttons and links twice. I plan to add a Please Wait message to come up when the page is posting back. I figured there are two obvious ways to do this: 1. AJAX Tools Using the AJAX UpdatePanel and progress loader, I can easily show a

问题 I have read countless blogs, posts and StackOverflow questions about the new features of C# 4.0. Even new WPF 4.0 features have started to come out in the open. What I could not find and will like to know: What are the major changes to CLR 4.0 from a C#/WPF developer perspective? What are the major changes to CLR 4.0 as a whole? I think, internally, most changes are for the new dynamic languages and parallel programming. But are there any other major improvements? Because language

问题 I have a two types that are very similar (i.e. the member names are very similar). Is there an elegant way to copy one type to another, without having to copy each individual member by hand? Update Here is some sample source code: main() { FromCsvFile x = new FromCsvFile(fileName); OptionsEnt y = x.ToOptionsEnt(); // See helper function below. } // Chained helper function to convert type "FromCsvFile" to type "OptionsEnt". // Want to replace this with something more elegant (perhaps with

问题 I have a two types that are very similar (i.e. the member names are very similar). Is there an elegant way to copy one type to another, without having to copy each individual member by hand? Update Here is some sample source code: main() { FromCsvFile x = new FromCsvFile(fileName); OptionsEnt y = x.ToOptionsEnt(); // See helper function below. } // Chained helper function to convert type "FromCsvFile" to type "OptionsEnt". // Want to replace this with something more elegant (perhaps with

问题 I have a two types that are very similar (i.e. the member names are very similar). Is there an elegant way to copy one type to another, without having to copy each individual member by hand? Update Here is some sample source code: main() { FromCsvFile x = new FromCsvFile(fileName); OptionsEnt y = x.ToOptionsEnt(); // See helper function below. } // Chained helper function to convert type "FromCsvFile" to type "OptionsEnt". // Want to replace this with something more elegant (perhaps with

问题 I am trying to invoke function of a class using Reflection (assuming that object initialization as no dependency on Function to be invoked) like this /// <summary> /// Calls a static public method. /// Assumes that the method returns a string /// </summary> /// <param name="assemblyName">name of the assembly containing the class in which the method lives.</param> /// <param name="namespaceName">namespace of the class.</param> /// <param name="typeName">name of the class in which the method

问题 This performance test is wrong or the system cache is working with exceptional performance? This is my result : [13] number of interactions 100000 : 63 milliseconds [14] number of interactions 100000 : 139 milliseconds [12] number of interactions 100000 : 47 milliseconds [15] number of interactions 100000 : 44 milliseconds End of test. Hardware : x86 Family 6 Model 23 Stepping GenuineIntel ~2992 Mhz 3.327 MB, 5.1.2600 Service Pack 3 using System; using System.Collections.Generic; using System

问题 This performance test is wrong or the system cache is working with exceptional performance? This is my result : [13] number of interactions 100000 : 63 milliseconds [14] number of interactions 100000 : 139 milliseconds [12] number of interactions 100000 : 47 milliseconds [15] number of interactions 100000 : 44 milliseconds End of test. Hardware : x86 Family 6 Model 23 Stepping GenuineIntel ~2992 Mhz 3.327 MB, 5.1.2600 Service Pack 3 using System; using System.Collections.Generic; using System